War Barge

{3}: Target creature gains islandwalk until end of turn. When War Barge leaves the battlefield this turn, destroy that creature. A creature destroyed this way can't be regenerated. (A creature with islandwalk can't be blocked as long as defending player controls an Island.)

Boomerang

Return target permanent to its owner's hand.

The Hive

{5}, {T}: Create a 1/1 colorless Insect artifact creature token with flying named Wasp. (It can't be blocked except by creatures with flying or reach.)

Remove Soul

Sol Ring

Control Magic

Enchant creature
You control enchanted creature.

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Flash Counter

Unsummon

Return target creature to its owner's hand.

Mahamoti Djinn

Flying (This creature can't be blocked except by creatures with flying or reach.)

Merfolk Assassin

{T}: Destroy target creature with islandwalk.

Counterspell

Island

Giant Tortoise

Giant Tortoise gets +0/+3 as long as it's untapped.

Anti-Magic Aura

Enchant creature
Enchanted creature can't be the target of spells and can't be enchanted by other Auras.

Gaseous Form

Enchant creature
Prevent all combat damage that would be dealt to and dealt by enchanted creature.